So I am indebted to someone who left a comment on my blog a couple of posts ago (Bernadette) and pointed me towards Book Mooch.
Here are the details from the About page.
BookMooch is a community for exchanging used books.
BookMooch lets you give away books you no longer need in exchange for books you really want.
Quite often these schemes don't work for us in the bottom half of the world, but it looks as if it might work for me. Already I have been contacted regarding books I listed last night. Admittedly both requests involve me sending a book to the US, but the person who originally pointed me towards the scheme says there are around 600 members in Australia, so I should be able to find a crime-fiction person or two, shouldn't I?